iOS HW H264 support.

webrtc/BUILD.gn

 # Copyright (c) 2014 The WebRTC project authors. All Rights Reserved.
 #
 # Use of this source code is governed by a BSD-style license
 # that can be found in the LICENSE file in the root of the source
 # tree. An additional intellectual property rights grant can be found
 # in the file PATENTS.  All contributing project authors may
 # be found in the AUTHORS file in the root of the source tree.
 
 # TODO(kjellander): Rebase this to webrtc/build/common.gypi changes after r6330.
 
@@ skipping 22 matching lines @@
   }
   if (is_posix) {
     defines += [ "WEBRTC_POSIX" ]
   }
   if (is_ios) {
     defines += [
       "WEBRTC_MAC",
       "WEBRTC_IOS",
     ]
   }
+  if (is_ios && rtc_use_objc_h264) {
+    defines += [ "WEBRTC_OBJC_H264" ]
+  }
   if (is_linux) {
     defines += [ "WEBRTC_LINUX" ]
   }
   if (is_mac) {
     defines += [ "WEBRTC_MAC" ]
   }
   if (is_win) {
     defines += [ "WEBRTC_WIN" ]
   }
   if (is_android) {
@@ skipping 177 matching lines @@
 
   configs += [ ":common_config" ]
   public_configs = [ ":common_inherited_config" ]
 }
 
 source_set("gtest_prod") {
   sources = [
     "test/testsupport/gtest_prod_util.h",
   ]
 }